Sweet trio

DRY YOUR EYES MATE

"She would come up to me at awards and say something and walk away, and I would think, Are we friends, or did she just give me the harshest insult of my life?"

Swift stuck the knife in, adding: “She tried to hire a bunch of people out from under me. … So now I have to avoid her. It's awkward, and I don't like it" – and revealing that the fued is seemingly all down to some creative members from crew jumping from her own team to the other undisclosed female musician.

The move made Calvin take to Twitter to slam his ex (who he dated between 2015 and 2016) for trying to steal his thunder, tweeting: “I know you're off tour and you need someone new to try and bury like Katy ETC but I'm not that guy, sorry. I won't allow it."

But now Calvin and Katy have been confirmed to have collaborated together on Calvin’s upcoming album Funk Wav Bounces Vol. 1.

The new release features a long roll call of famous music stars as collaborators – from Ariana Grande to Snoop Dogg.

However the inclusion of Katy Perry in the list has sent fans wild with speculation that they have penned a revenge tune together.